Introduction - If you have any usage issues, please Google them yourself
With the rapid development of modern information technology, the information technology of the increasingly high demand. Security, privacy, copyright on the information we need attention all the more. Based on this, the digital watermarking technology is applied. Digital watermarking technique is to some hidden information block. The carrier into the digital information, the digital watermarking technology the information is converted from one form to another, similar to the signal from the time domain into the frequency domain and then to deal with the problem. Digital watermarking can be divided into blind watermarking and non-blind watermark, non-blind watermarking system in testing or when extracting the watermark information, need the original image but also affect the visual perception of people blind watermarking system in detecting or watermark extraction process, does not need the original carrier image, also do not need to embed the watermark, the watermark the system has a